<template>
  <div class="pagination">
    <button>上一页</button>
    <button>1</button>
 
    <button>···</button>

    <button>3</button>
    <button>4</button>
    <button>5</button>
    <button>6</button>
    <button>7</button>
    
    <button>···</button>
    <button>{{totalPage}}</button>
    <button>下一页</button>
    
    <button style="margin-left: 30px">共{{total}}条</button>
  </div>
</template>

<script>
  export default {
    name: "Pagination",
    props:['pageNo','pageSize','total','continues'],
    computed: {
      // 共多少页
      totalPage(){
        // 想上取整数
        return Math.ceil(this.total/this.pageSize)
        
      },
      // 计算出连续的页码的起始数字与结束数字[连续的页码数字至少是5]
      startNumAndEndNum(){
        // 先定义两个变量存储起始数字和结束数字
        let start =0 
        let end = 0
        // 如果出现不正常的现象【连续页码数字5，不够5页】
        // 不正常的现象
        if(this.continues>this.totalPage){
          start = 1
          end = this.totalPage()
        }else{
          // 正常现象【连续代码数大于5，总页数一定大于5】
          start = this.pageNo - Math.floor(continues/2)
          end = this.pageNo + Math.floor(continues/2)
        }
      }
    }
  }
</script>

<style lang="less" scoped>
  .pagination {
    text-align: center;
    button {
      margin: 0 5px;
      background-color: #f4f4f5;
      color: #606266;
      outline: none;
      border-radius: 2px;
      padding: 0 4px;
      vertical-align: top;
      display: inline-block;
      font-size: 13px;
      min-width: 35.5px;
      height: 28px;
      line-height: 28px;
      cursor: pointer;
      box-sizing: border-box;
      text-align: center;
      border: 0;

      &[disabled] {
        color: #c0c4cc;
        cursor: not-allowed;
      }

      &.active {
        cursor: not-allowed;
        background-color: #409eff;
        color: #fff;
      }
    }
  }
</style>
